Control for head lamps for motor cars



April 21, 3 w. E. HUTCHISON ETAL 1,801,364

I CONTROL FOR HEAD LAMPS FOR MOTOR CARS Filed Feb. 4. 1929 INVZNTQRS.

W. E HurcH/sa/v ,5.w. Recs.

Patented Apr. 21, 1931 V i v v UITE s'r'rss erFicE WILLIAM ERNESTHUTCHISON, or cnimirr, Am) avin EDWARD WILLIAM Runs,

1 er BARRY, w Lns CONTROL FOR HEAD LJifilS FOR MOTOR CARS Applicationfiled February 4, 1532-9, Serial No. 337,380, and in Great BritainFebruary 11, 1928.

This invention comprises a new or imthe solenoid core 10 and positionedbetween proved control for headlamps for motor cars the projection 19and gland nut or the like 11, and the like, for use more particularlyfor is a compression spring 20, which normally that type of headlamp inwhich the bulb is retains the segmental reflector and lamphold- 5 movedout of focus in order to eliminate the er in the position shown inFigure 1. 55

glare, the object of the present invention be- On the rear of. theclosure member 8 is ing to provide a simple and eificient electrimountedthe trip coil 21, together with the cally controlled device for thespecified purpole pieces 22, 23,the pole piece 23,has mountpose, edtherein a spring controlled ball or plunger 1 Referring to the drawings24, so thatwhen the colenoid core is re- Figure 1, is a section of aheadlamp and tractedthe top of the square rod 9 will engage controlaccording to this invention, whilst, the springcontrolled ball 24, whichexerts Figure 2, is an end view of the solenoid. thereon a slightpressure so that when the gap casing with the cover removed. 12registers with the square hole formed in At the rear of the lamp casing3, a flange the closure member 8, the pressure exerted by 6 4 is securedinto which slides a tubular part the ball 24 will cause the solenoidcore 10 to 5, in which is mounted the coil 6 of the solerock slightlyand be locked in its retracted V noid. The solenoid coil 6 is mounted ona position thereby retaining the bulb 25 in bobbin 7 which at its rearis externally this position. 1

screwed, so as to screw into a closure mem- In order to withdraw thesegmental reflec- 70 her 8 which is adapted to be screwed 0r tor 16, andbulb 25, into a non-glaring posiotherwise secured into the end of thetubular tion the solenoid coil 6 is energized and the extension 5 on thelamp casing a hole which solenoid core 10 is withdrawn against the acispreferably of square shape is formed in tion of the tension spring 20,when it is authe centre of said closure member 8 and protomaticallyretained in its retracted position vides a guide for a square rod 9which is by reasonof the'gap 12, engaging the edge connected to thesolenoid core 10 whilst the of the square hole formed in theclosurememsolenoid core 10 is provided with a guide her 8 through whichthe square r0d9 passes. which takes the form of a gland nut or the Inorder to operatethe solenoid and the like 11, which is secured to thesolenoid bo trip magnet suitablecontrols are provided 7 bin 7 and ispositionedat the front of the in the form of press contacts or switchessolenoid coil. whichare positioned adjacent to the driver in The Solenid o e 10 at l n 13 order .to control the beforedescribed operapered soas to permit of it tilting slightly ti When it is Withdrawn and the l 12in e To return the segmental reflector 16, and registering with theSquare hole formed bulb 25 to their normal position as shown In thecover V 4 1 in Figure 1 of the drawing the trip coil 21 is The Solenmdcore may have smal energized the square rod 9 is drawn towards recess13, formed on its under side so as to thb magnets 22 23 thereb 4O V g ycisengaging the g9 facilitate the rocklng of the solenoid core g p 12from lower edge of the Square hole when the gap 12 formed in the rod 9engages formed in the closure member 8 and permitthe square hole in theclosure member 8. The .7 purpose of the rocking of the solenoid Coreting the solenoid together with the segmental 10 will be more fullyexplained hereafter. reflector 16 and 1 1 holder to return to Mounted onthe end of the solenoid core than normal P03151011 under the e of 10 isa lampholder 14;, on which is mounted compreisslon sPrmg the segmentalreflector 16, which forms part r0 provldeufor a longltudufal adJuStm91}tf th i fl t 17 Th l h ld 14 of the solenoid, the flange 4 is split andis is provided with contact members 18 to which provided with lugs 27,through which passes m 50 the usual connections are made; mounted on thebolt 28, so that by loosening the bolt 28 the iii) tubular part 5 can beslidably adjusted therein.

A casing 26 is provided which is adapted to cover the solenoid casingand the other parts of the device, said casing being secured to theheadlamp casing 3.

i hat we claim is 1. A control for headlamps for motor cars comprisingin combination a solenoid, a solenoid core, a bulb holder mounted onsaid solenoid core, an extension of said solenoid core, a trip coilmounted adjacent to said exte Si011,21 spring controlled member mountonsaid trip coil and adapted to engage and de ress the solenoid coreextension when its retracted position, a gap formed in said s lenoiocore extension, stop which is adapted to engage the gap in the solenoidcore extension and retain the solenoid core in its retracted position,the energization of the trip coil lifting the solenoid core extensionand permitting the solenoid core to automatically return to its normalposition.

2. A headlamp for motor cars comprising in combination a casing, areflector disposed in said casing having an aperture therein, a solenoidmounted on said casing, a core mounted in said solenoid, a bulb holdermounted on the solenoid core, a reflector adapted to close the apertureformed in the reflector mounted adjacent to the bulb holder on saidsolenoid core, an extension of said solenoid core, a. trip coil mountedadjacent to said extension, a spring controlled member mounted on saidtrip coil and adapted to enand depress the solenoid core extension whenin its retracted position, a gap formed in said solenoid core extension,a stop which is adapted to engage the gap in the solenoid core extensionand retain the solenoid core in its retracted position, the energizationof the trip coil lifting the solenoid core extension and permitting thesolenoid core to automatically return to its normal position.

In testimony whereof, we have signed our names to this specification.

WILLIAM ERNEST HUTCI-IISON.

DAVID EDVARD WILLIAM REES.

